Improvement in balance-valves for steam-engines



UNITED STATES EEICE.

PATENT THOMAS RICHARDS, LANSINGBURG, NEW YORK.

Specification forming part of Letters Patent-No. 54,959, dated May 22,1866 antedated May 7, i866.

Vof the cylinder by a conical valve in such a manner that the valve isat all times balanced, and by the oscillating motion of the plug thealternate transmission of steam may be effected.

To enable others skilled in the art to make and use my invention, Iproceed to describe its construction and operation.

Figure-l represents a section of my valve, showing double ports, 011e oneach opposite part of the valve, for the same purpose of transmittingsteam to the cylinder and exhaustpassages. a a are the passagesconnecting with the boiler by a double steam pipe. b b areexhaust-passages for giving the steam into the smoke box 5 c, port forconducting steam and exhaust alternately to and from one end of thecylinder; d, for conducting steam to the other end and exhaust-portalternately by the oscillation of the plug. The valve being in itsplace, we will suppose the plug in the position shown, covering the twosteam and two exhaust ports. Thus there will be no communication witheither end of the cylinder. This is from one end of the cylinder to theother. Now, if the plug be moved the steam will bc admitted to one endof thc cylinder,'and that which is way round the valve in the casting orby a pas-4 sage across the opposite head.

Fig. 2 represents a perspective view of my valve suitable for alocomotive, with the steam and exhaust pipes for conducting the steam toand from the cylinder in the back end of the smoke-box.

Fig. 3 represents the plug with four cavities, two of which, c c, areseen with the opposite cavities in the plug, receive and transmit thesteam to the cylinder and exhaust-passages.

I do not claim for the number of ports in the valve-seat and cavities inthevalve, that having been patented to myself February 23, 1858, (thenresiding in Plattsburg, New York.)

What I claim as my invention, and desire to secure by Letters Patent,is-

The Within-described arrangement of the ports in valve-seat and valve,so as to make the steam and exhaust ports balanced under any pressure ofsteam, substantially as set forth.

' THOMAS RICHARDS.

Witnesses EDWARD A. J UDsoN, W. D. BAULAN. g

